22031121313 has 2 divisors, whose sum is σ = 22031121314. Its totient is φ = 22031121312.

The previous prime is 22031121289. The next prime is 22031121317. The reversal of 22031121313 is 31312113022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20787007329 + 1244113984 = 144177^2 + 35272^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22031121313 is a prime.

It is not a weakly prime, because it can be changed into another prime (22031121317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11015560656 + 11015560657.

It is an arithmetic number, because the mean of its divisors is an integer number (11015560657).

Almost surely, 2^22031121313 is an apocalyptic number.

It is an amenable number.

22031121313 is a deficient number, since it is larger than the sum of its proper divisors (1).

22031121313 is an equidigital number, since it uses as much as digits as its factorization.

22031121313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 22031121313 its reverse (31312113022), we get a palindrome (53343234335).

The spelling of 22031121313 in words is "twenty-two billion, thirty-one million, one hundred twenty-one thousand, three hundred thirteen".